package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.ann.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishFlovorMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.dishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServicelmpl implements DishService {
    @Autowired
    private dishMapper dishMapper;
    @Autowired
    private DishFlovorMapper dishFlovorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和对应口味
     */
    @Override
    @Transactional   //事物
    public void add(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入1条数据
        dishMapper.insert(dish);
        //获取insret语句生成的主键值
        Long dishId = dish.getId();
        //向口味表插入数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        //判断用户是否传过来了口味
        if(flavors!=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);

            });
            //向口味表插入n条数据（批量插入）
            dishFlovorMapper.insert(flavors);

        }

    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageSelect(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.select(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 修改菜品和关联的口味
     * @param dishDTO
     */
    @Override
    public void update(DishDTO dishDTO) {

        Dish dish =new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品信息
        dishMapper.update(dish);
        //删除所有原有口味数据
      dishFlovorMapper.deleteByDishId(dishDTO.getId());
        //重新插入前端传过来的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()>0 ){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlovorMapper.insert(flavors);
        }
    }

    /**
     * 根据id查询菜品和对应口味
     * @param id
     * @return
     */
    @Override
    public DishVO selectId(Long id) {
        //根据id查询菜品数据
       Dish dish= dishMapper.selectId(id);
        //根据菜品id查询口味数据
      List<DishFlavor>  dishFlavor=dishFlovorMapper.selectId(id);
        //将查询到的数据分装到VO
      DishVO dishVO=new DishVO();
      BeanUtils.copyProperties(dish,dishVO);
      dishVO.setFlavors(dishFlavor);
      return dishVO;
    }

    /**
     * 删除菜品
     */
    @Override
    @Transactional
    public void delete(List<Long> ids) {
     //判断当前菜品是否能删除--是否是起售状态
        for (Long id : ids) {
           Dish dish= dishMapper.selectId(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                //起售状态，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否能删除--是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null && setmealIds.size()>0){
            //当前菜品被关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的数据
//        for (Long id : ids) {
//            dishMapper.DeleteId(id);
//            //删除菜品关联口味数据
//            dishFlovorMapper.selectId(id);
//        }

        //批量删除菜品表中的数据
        dishMapper.DeleteIds(ids);
        //批量删除菜品关联口味数据
        dishFlovorMapper.DeleteIds(ids);
    }
    /**
     * 起售，停售
     */
    @Override
    public void status(Integer status, Long id) {
        Dish dish=new Dish();
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish=new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);
        return  dishMapper.list(dish);

    }

    /**
     * C端根据分类id查询菜品和口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlovorMapper.selectId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;

    }




}
